Zobrazeno 1 - 10
of 123
pro vyhledávání: '"Janssen, H. K."'
Starting from the well-known field theory for directed percolation, we describe an evolving population, near extinction, in an environment with its own nontrivial spatio-temporal dynamics. Here, we consider the special case where the environment foll
Externí odkaz:
http://arxiv.org/abs/0706.0450
Using renormalized field theory, we examine the dynamics of a growing surface, driven by an obliquely incident particle beam. Its projection on the reference (substrate) plane selects a ``parallel'' direction, so that the evolution equation for the s
Externí odkaz:
http://arxiv.org/abs/cond-mat/0602641
Autor:
Lubeck, S., Janssen, H. -K.
Publikováno v:
Physical Review E 72, 016119 (2005)
We consider analytically as well as numerically the finite-size scaling behavior in the stationary state near the non-equilibrium phase transition of directed percolation within the mean field regime, i.e., above the upper critical dimension. Analogo
Externí odkaz:
http://arxiv.org/abs/cond-mat/0505212
Autor:
Stenull, O., Janssen, H. K.
Publikováno v:
Europhys. Lett. 51, 539-545 (2000)
Using renormalization group methods we study multifractality in percolation at the instance of noisy random resistor networks. We introduce the concept of master operators. The multifractal moments of the current distribution (which are proportional
Externí odkaz:
http://arxiv.org/abs/cond-mat/0002384
Publikováno v:
Phys. Rev. E 61 (2000) 5977
It has recently been suggested that the driven lattice gas should be described by a novel field theory in the limit of infinite drive. We review the original and the new field theory, invoking several well-documented key features of the microscopics.
Externí odkaz:
http://arxiv.org/abs/cond-mat/9912286
Autor:
Janssen, H. K., Stenull, O.
Publikováno v:
Phys. Rev. E 61, 4821-4834 (2000)
We study random networks of nonlinear resistors, which obey a generalized Ohm's law, $V\sim I^r$. Our renormalized field theory, which thrives on an interpretation of the involved Feynman Diagrams as being resistor networks themselves, is presented i
Externí odkaz:
http://arxiv.org/abs/cond-mat/9910427
Autor:
Becker, V., Janssen, H. K.
We present a field theoretic renormalization group study for the critical behaviour of a uniformly driven diffusive system with quenched disorder, which is modelled by different kinds of potential barriers between sites. Due to their symmetry propert
Externí odkaz:
http://arxiv.org/abs/cond-mat/9904216
Publikováno v:
Phys. Rev. E 59, R6239-R6242 (1999)
We present a new view of Feynman diagrams for the field theory of transport on percolation clusters. The diagrams for random resistor networks are interpreted as being resistor networks themselves. This simplifies the field theory considerably as we
Externí odkaz:
http://arxiv.org/abs/cond-mat/9901223
Autor:
Janssen, H. K.
It is shown that the universal critical properties of two recently introduced coupled directed percolation processes can be described by a single rapidity reversal invariant stochastic reaction-diffusion model. It is demonstrated that all renormaliza
Externí odkaz:
http://arxiv.org/abs/cond-mat/9901188
Publikováno v:
Phys. Rev. E 59, 4919-4930 (1999)
An approach by Stephen is used to investigate the critical properties of randomly diluted resistor networks near the percolation threshold by means of renormalized field theory. We reformulate an existing field theory by Harris and Lubensky. By a dec
Externí odkaz:
http://arxiv.org/abs/cond-mat/9812413